Speech vent



' relation with the glass wall.

also of bullet-proof glass, s usually.

i 30 guard plates in Patented Oct 9,192&

HENRY J'. TEIELKER,

COMPANY OF NOETH AMERICA, OF NEW YORK,

WARE.

OF NEW YORK, N. Y., ASSIGNR TO TBIPLEX SAFETY GLASS N. Y., A CORPORATION OF DELA- p SPEECE y VENT.

Application med Januar 19, 1928. Serial No 241774.

The use of bullet-proof glass in the formation of bank-teller s cages has now become quite general and as a further measure of safety and convenience a speech vent, for

6 oral communication between teller and customer, is generally provided, the. aperture through the glass being guardedagainst the discharge of a gun by a guard plate which over-laps the aperture and is held in spaced Such guard plate, Secured in position by bolts which' pass through the guard plate and through the glass wall, sleeves or other spacing devices being interposed between the plate and the wall. The and wall for the reception ot' the bolts increases the liabilityjto fracture, especially when the bolts are setup tightly or the guard 2 plate is subjected to pressure. It has been proposed also to secure the guard plate in position by devices which do not involve the drilling ot holes in the glass i'or the reception of bolts, but because of their cumbersome character or the ditliculty in securng them in position, or for some other reason, such I o devices do not appear to have come into general use. It is the object of the present invention to provide means for securing such position which do not reuire glass to be drilled :tor bolts and are t iemselves acceptable in appearance, do not obscure the light to any marked extent, are light in Construction yet' strong, and are 5 'capable of easy application. The invention will be more fully explained hereinafter with reference to the accompanying drawing in which it is illustrated' and in' which:

Figure 1 is a View in elevation showing a 40 portion of a glass wall with its aperture and improved device for securing the guard plate in position, the latter being also indicated.

Figure 2 is a view in section on the plane indicated by the broken line 2-2 of Figure 1.

Figure 3 is a view in perspective of one of the clamping devices.

In the drawing the glass wall a, presumably of bullet-proof glass, is shown as provided at a with a circular aperture for oral 60 communication. Associated with the aperture a* is a guard plate b, also presumablyv of bullet-proof glass, also circular in form and of such size as to over-lap the aperture a drilling of the holes in the plate when in position, to such an extent that, when the guard plate is properly spaced from the wall, the teller would not be in the line of fire directed through the space between the wall and the guard plate.- he guard late is secured in position by reversely hoo ed 'bars c so proportioned that one of the hooks, as 0 may engage the wall a at the edge of the aperture a being directed away from' the center of the aperture,-while the other, as 0 may engage the edge of the guard-plate b, being directed inwardly toward the center. The bar c is also slotted, in itsmiddle 'portion, as at c, for a pur ose to be explained.

Associated with each ar c are two wedge blocks d and d slotted as at d for convenience inassembling. The two blocks al' and d are oppositel placed when assembled with the hooked ar', and are drawn toward each other, on opposite sides of the slotted middle portion of the hooked bar, by bolts e. Felt packing f may be placed between the hooked bars and the guard plates and b etween the blocks and the guard plate on one side and thewall on the other side. The wedge blocks serve to hold the guard plate in proper spaced relation with the wall and, when drawn tightly toward each other by the bolts e, hold the guard plate firmly in posi-- tion.

It will be' seen that the improved devices are inexpensive to` manufacture, are easily and quickly applied, cut off but little light, and hold the guard plate in position without exposing either the glass wall'or the glass guard plate to danger of fracture.

I claim as my invention.

1. A device for securing a guard plate in spaced relation with an apertured wall, said device comprising a reversely hooked bar adapted to engage at one end the edge of the apertured wall and at the other end the edge of the guard plate, a wedge block interposed between the hooked bar and the adj acent wall, and means to draw the wedge into position.

2. A device for securing a guard plate in spaced relation with an apertured wall, said device comprising a reversely hooked bar adaptecl to engage at one end the edge of the apertured wall and at the other end the edge of the guard plate, said bar being slotted n its middle portion, a wedge block interposed between the hooked, bar and the adjacent wall, and a bolt passed through the wedge its middle portion, slotted wedge blocks ap- 10 block'and the slotted bar to draw the Wedge plied to opposite sides of the middle portion block into position. of the bar, and a bolt passedthrough the 3. A devce for securing a guard plate in Wedge blocks and theslotted bar to draw the 5 spaced relation with an apertured Wall, said Wedge blocks toward each other.

device comprising a' reversely hooked bar This specification signed this 17th day of 1 adapted to engage at one end the edge of the January, A. D. 1928. a ertured wall and at the other end the ed e o the guard plate, the bar being slotted n I HENRY J. THIELKER. 

